Gearing for grain-drills.



Nom 736,436. PA TENTED AUG. 18, 1903.

0. IL "PELTON. GEARI-N G. FOR GRAIN DRILLS.

APPLICATION FILED APR. 12, 1902.

H0 MODEL- VQ TNESSES rte-recess.

, nrr A Patented August 18, 1903.

'CHARLESH. PELTONpOF SPRINGFIELD, o no, Assmnon To THE- THOMAS MANUFACTURING coMrANnoF SPRINGFIELD, OHIO, A CORPORATION or OHIO. p q

' demand-Foe GRAI N-DRILLS.

SPECIFICATION forming of Letters Patent No. '73 6,4536, dated August 18, 1903. l l l I Application filed April 12, 1902. Serial No. 102,536. (No model.)

I To. all whon't it may concern:

Be it known tliatl, CHARLES HLPELTON, a citizen of the United States, residingat Springfield, in the county of Clark and State of Ohio,

5have invented certain new and useful Improvements in Gea ring for Grain-Drills, of :which the following is a specification, reference being had therein to the accompanying drawings. a p

This invention relates to gearing for graindrills, and more particularly to the shifting mechanism and indicator whereby the shifting pinion of the change-speed gear is operated and its position indicated.

The present invention has for its object to provide a simple and efticient construction-of these'parts; and to these ends it consists in certain novel features which I will now proceed to describe and will then particularly point out in the claims. I I

In the accompanying drawings, Figure 1 is a detail sectional view of a portion of a graindrill having my improvements applied thereto. Fig. 2 is an enlarged detail View, in side elevation, of the device. vation of the device. Fig. i is a detail sectional plan taken on the line m w of Fig. 3, and Fig. 5 is'a'detail sectional plan taken on the line y y of Fig. 2. y

In said drawings, 1 indicates the hopper, and 2 the distribnter-shaft by which the distributers are driven, the same deriving its motion through bevel-gearing 3 from a shaft 4, having splined thereona sliding pinion 5, which meshes with a change-speed disk 6, driven by the axle 7 These parts may be of any approved construction. The pinion 5 is shifted on the shaft 4 to regulate the speed of the distributors, and to this end it is provided with a grooved hub 8.- This grooved hub is embraced by a yoke 9, connected by an arm 10 with a sleeve 11, which slides upon a guiderod 12. The sleeve 11 has an aperture 13, circular in cross-section, so as to permit it to rock to a certain extent upon the guide-rod 12 to cause it to adjustitself to the minor variations of theshaft e and pinion 5. In order to lock the parts in position after adjustment, the guide-rod 12 is provided with a rack 14, which cooperates with a pawl 15, mounted on Fig. 3 is a front elethe sleeve 11. In order to prevent clogging of the rack, the rod 12, which is of general circular outline, has its rear face flattened, as indicated at 16, the teeth of the rack 14 projecting from this [flattened surface to an extent sufficient to complete the circular outline'ot the rod at that part and form a suit able bearing-support or guide for the sleeve 11. The pawl 15 is pivoted between lugs 17 of the sleeve 11, as indicated at -1S.'a'nd there -is interposed between said pawl and the sleeve or its arm 10 a spring 19, which tends to engage the pawl with the rack and hold it in such engagement. By reason'of this construction the rack is readily cleaned and kept clean, and the pawl is'self-locking in its action, so as to holdthe parts automatically in their adjusted position.

The upper end of the rod 12 has formed on or secured to it the indicator-plate 20, which is divided into scales in the usual manner. In the present instance I have shown the rod and plate as'supported in position by se .curing the lower end of the rod to the hearing 21, while the upper end ofthe plate is socured to the hopper, as indicated at 22. The indicator-arm is shown at 23 and is pivotally connected at 24: to the sleeve 11 by means of a pivot parallel with the face of the indica tor-plate 21. Said indicator-plate has parallel guiding edges 25, and the indicator-arm 23 is provided with a terminal. head 26, having formed on one side thereofa hook-shaped projection 27, which passes around the edge of the indicator-plate and extends a short distance over the back of the same, so as to hold the indicator-head in position against the plate. A short lug 28 bears againstthe opposite edge of the indicator-plate, and the head is provided with a projecting pointer 29,which serves to accurately indicate the figures on the scales of the indicator-plate. The indicator-arm is thus held firmly in position against the plate, but may be disengaged therefrom by lowering the sleeve 11 until the head 26 is clear of the lower endof the indicator-plate, when the arm and head may he swung outward on the pivot 24, and thus be disengaged. V

I do not wish to be understood as limiting myself to the precise details of construction hereinbefore described, and shown in the accompanying drawings,-as they may obviously be modified without departing from the principle of my invention.

As herein-before stated, the sleeve 11 is'permitted to rock slightly upon the guide-rod 12,

and to this end 'said guide-rod is made sub:

stantially circular in cross-section, in the sense that although portions of it are removed to form the teeth of the rack 14, and other portions are removed by grooving the rod longitudinally for the sake of lightness and to prevent clogging, the general outline of the rod in cross-section is circular, there being no projecting parts beyond this outline to prevent rotation of the sleevethereon, and it is in this sense that I employ the term substantially circular in ezross-section in the claims.

' Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

.a pawl pivoted on said sleeve and provided witha spring to cause its inner end to nor- 5c mally engage the v 1 a ck,;its outer end extending laterally with respect to'the sleeve,whereby, when said outer end is pushed inward or forward, the inner end of the pawl is disengaged from the rack, substantially as de- 35 .tion and provided with a yoke to engage the 45 pinion, a pawl pivotally mounted on said sleeve, and a spring actuating said pawl to cause it to normally engage the rack, substantially as described.

In testimony whereof .I affix my signature 50 in presence of two witnesses.

CHARLES H. PE LTON.

Witnessesz AL. H. KUNKLE, WILL OLAUGHLIN. 

